diff --git a/src/app/Backends/Roundcube.php b/src/app/Backends/Roundcube.php
--- a/src/app/Backends/Roundcube.php
+++ b/src/app/Backends/Roundcube.php
@@ -9,6 +9,7 @@
 {
     private const FILESTORE_TABLE = 'filestore';
     private const USERS_TABLE = 'users';
+    private const IDENTITIES_TABLE = 'identities';
 
     /** @var array List of GnuPG files to store */
     private static $enigma_files = ['pubring.gpg', 'secring.gpg', 'pubring.kbx'];
@@ -218,7 +219,7 @@
 
             $uri = \parse_url(\config('imap.uri'));
 
-            return (int) $db->table(self::USERS_TABLE)->insertGetId(
+            $user_id = (int) $db->table(self::USERS_TABLE)->insertGetId(
                 [
                     'username' => $email,
                     'mail_host' => $uri['host'],
@@ -226,6 +227,18 @@
                 ],
                 'user_id'
             );
+
+            $username = \App\User::where('email', $email)->first()->name();
+
+            $db->table(self::IDENTITIES_TABLE)->insert([
+                    'user_id' => $user_id,
+                    'email' => $email,
+                    'name' => $username,
+                    'changed' => now()->toDateTimeString(),
+                    'standard' => 1,
+            ]);
+
+            return $user_id;
         }
 
         return (int) $user->user_id;
diff --git a/src/tests/Feature/Backends/RoundcubeTest.php b/src/tests/Feature/Backends/RoundcubeTest.php
new file mode 100644
--- /dev/null
+++ b/src/tests/Feature/Backends/RoundcubeTest.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace Tests\Feature\Backends;
+
+use App\Backends\Roundcube;
+use Tests\TestCase;
+
+class RoundcubeTest extends TestCase
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $this->deleteTestUser('roundcube@' . \config('app.domain'));
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function tearDown(): void
+    {
+        $this->deleteTestUser('roundcube@' . \config('app.domain'));
+
+        parent::tearDown();
+    }
+
+    /**
+     * Test creating a Roundcube user record (and related data)
+     *
+     * @group roundcube
+     */
+    public function testUserCreation(): void
+    {
+        $user = $this->getTestUser('roundcube@' . \config('app.domain'));
+        $user->setSetting('first_name', 'First');
+        $user->setSetting('last_name', 'Last');
+
+        $db = Roundcube::dbh();
+
+        // delete the user record if exists
+        if ($userid = Roundcube::userId($user->email, false)) {
+            $db->table('users')->delete();
+        }
+
+        // Create the user
+        $userid = Roundcube::userId($user->email);
+
+        $rcuser = $db->table('users')->where('username', $user->email)->first();
+
+        $this->assertTrue(!empty($rcuser));
+
+        $rcidentity = $db->table('identities')->where('user_id', $rcuser->user_id)->first();
+
+        $this->assertSame($user->email, $rcidentity->email);
+        $this->assertSame('First Last', $rcidentity->name);
+        $this->assertSame(1, $rcidentity->standard);
+    }
+}